The seven pin will not work, cat has an 8 pin plug. You can get it to work with some wiring. I don't know how the 6 way works not sure how new it is, if its older you can get it to work by just hardwiring it into a new plug from Cat to the correct pins and you will be fine might need to add some relays depending on the wiring on the bobcat dozer blade. I wired a bobcat sweeper to a cat plug once and the motor it had only had two wires that were both ground and switched to power when powered, so I needed some relays to get that working properly. I have a 07' bobcat soil conditioner and that actually has some kind of controller so I needed the bobcat toggle switch setup, but I didn't use the toggle switch I cut it off and pin'd it into a cat 8 pin connecter to so it looks factory.
Bobcat has come out with a 7 & 14 pin wiring harness that allows them to hook Bobcat branded attachments to competitive machines. They created this "T-harness" in order to allow them to sell attachments to every body, not just bobcat customers.
Stop by your local Bobcat dealership and ask them to help you. They should know what to do.